Other diverse research areas, such as language studies,
engineering, law, chemistry, or urban planning

Our best-known products include:

LISREL
9.2 The pioneering software for structural equation
modeling now includes statistical methods for complex survey data. Create path diagrams
in an easy to use interface and generate syntax directly
from the diagram. The latest LISREL for Windows includes
the following statistical applications.

HLM
7 Hierarchical data modeling with power. The latest
version includes an improved interface, HTML output, and
new statistical features such as cross-classified random
effects for linear models for three-level data, and linear
and nonlinear models for four-level data.

Item
Response Theory Our group of item analysis programs
(BILOG-MG, IRTPRO, and PARSCALE) now feature friendly, new
Windows graphical user interfaces. They are all the tools
you will need to perform a wide variety of analyses on many
different types of tests and items.